| 16.69% |
January 01, 2012 - January 31, 2012 |
| 15.63% |
December 01, 2011 - December 31, 2011 |
| 18.57% |
November 01, 2011 - November 30, 2011 |
| 19.71% |
October 01, 2011 - October 31, 2011 |
| 21.71% |
September 1, 2011 - September 30, 2011 |
| 18.57% |
August 01, 2011 - August 31, 2011 |
| 19.71% |
July 01, 2011 - July 31, 2011 |
| 20.57% |
June 1, 2011 - June 30, 2011 |
| 20.57% |
May 01, 2011 - May 31, 2011 |
| 19.71% |
April 01, 2011 - April 30, 2011 |
| 18.57% |
March 01, 2011 - March 31, 2011 |
| 16.29% |
February 01, 2011 - February 28, 2011 |
| 15.14% |
January 01, 2011 - January 31, 2011 |
| 15.14% |
December 01, 2010 - December 31, 2010 |
| 14.29% |
November 01, 2010 - November 30, 2010 |
| 14.29% |
October 01, 2010 - October 31, 2010 |
| 14.89% |
September 01, 2010 - September 30, 2010 |
| 14.91% |
August 01, 2010 - August 31, 2010 |
| 14.57% |
July 01, 2010 - July 31, 2010 |
| 14.57% |
June 01, 2010 - June 30, 2010 |
| 13.14% |
May 01, 2010 - May 31, 2010 |
| 13.71% |
April 01, 2010 - April 30, 2010 |
| 12.26% |
March 01, 2010 - March 31, 2010 |
| 10.86% |
February 01, 2010 - February 28, 2010 |
| 12.26% |
January 01, 2010 - January 31, 2010 |
| 12.86% |
December 01, 2009 - December 31, 2009 |
| 13.43% |
November 01, 2009 - November 30, 2009 |
| 13.03% |
October 01, 2009 - October 31, 2009 |
| 13.71% |
September 01, 2009 - September 30, 2009 |
| 12.29% |
August 1, 2009 - August 31, 2009 |
| 13.42% |
July 1, 2009 - July 31, 2009 |
| 13.71% |
June 01, 2009 - June 30, 2009 |
| 11.14% |
May 1, 2009 - May 31, 2009 |
| 11.09% |
April 01, 2009 - April 30, 2009 |
| 9.71% |
March 01, 2009 - March 31, 2009 |
| 9.94% |
February 01, 2009 - February 28, 2009 |
| 6.23% |
January 01, 2009 - January 31, 2009 |
| 8.57% |
December 01, 2008 - December 31, 2008 |
| 14.29% |
November 01, 2008 - November 30, 2008 |
| 20.37% |
October 01, 2008 - October 31, 2008 |
| 23.60% |
September 01, 2008 - September 30, 2008 |
| 23.71% |
August 01, 2008 - August 31, 2008 |
| 25.40% |
July 01, 2008 - July 31, 2008 |
| 23.33% |
June 01, 2008 - June 30, 2008 |
| 23.33% |
May 01, 2008 - May 31, 2008 |
| 20.50% |
April 01, 2008 - April 30, 2008 |
| 18.00% |
March 01, 2008 - March 31, 2008 |
| 16.00% |
February 01, 2008 - February 29, 2008 |
| 16.67% |
January 01, 2008 - January 31, 2008 |
| 16.67% |
December 01, 2007 - December 31, 2007 |
| 15.33% |
November 01, 2007 - November 30, 2007 |
| 15.00% |
October 01, 2007 - October 31, 2007 |
| 16.67% |
September 01, 2007 - September 30, 2007 |
| 16.67% |
August 01, 2007 - August 31, 2007 |
| 17.20% |
July 01, 2007 - July 31, 2007 |
| 19.53% |
June 01, 2007 - June 30, 2007 |
| 20.87% |
May 01, 2007 - May 31, 2007 |
| 18.20% |
April 01, 2007 - April 30, 2007 |
| 14.33% |
March 01, 2007 - March 31, 2007 |
| 12.00% |
February 01, 2007 - February 28, 2007 |
| 15.66% |
January 01, 2007 - January 31, 2007 |
| 13.30% |
December 01, 2006 - December 31, 2006 |
| 12.66% |
November 01, 2006 - November 30, 2006 |
| 13.30% |
October 02, 2006 - October 31, 2006 |
| 15.00% |
September 01, 2006 - September 30, 2006 |
| 17.00% |
August 01, 2006 - August 31, 2006 |
| 17.00% |
July 11, 2006 - July 31, 2006 |
